Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 107, Issue -, Pages 181-190Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2015.12.190
Keywords
Air-void; High-porosity cement foam; Hardened property; Metakaolin; Microstructure; Portland cement; Silica fume; Stability; Workability
Categories
Funding
- Fund of Science and Technology on Surface Physics and Chemistry Laboratory [SPCXT201303]
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High-porosity cement foams based on ternary blends of Portland cement, metakaolin and silica fume were prepared by the pre-foaming method. The effects of ternary blends on the early-age properties, air-void structure and hardened state properties of cement foams were investigated. The effect of meta kaolin and silica fume on stabilizing air-voids was observed, and the collapse of cement foams during the hardening process was avoided by addition of metakaolin. Moreover, the compressive strength of the prepared 91% high-porosity cement foams was enhanced by addition of metakaolin and silica fume. The compressive strength and thermal conductivity reached 0.74 MPa and 0.054 W/m K, respectively. However, metakaolin and silica fume had a negative impact on the workability of the cement foam. (c) 2015 Elsevier Ltd. All rights reserved.
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